Tonya, you have some really good responses here, but thought I would add some to them.
For makeup, I still haven't learned, because I'm slow to learn new things. However, once learned, I'm an expert. There are plenty of YouTube videos, which my wife recommended me. To get the absolute basics down however, like what certain things are for, I'd say find an open-minded friend to help.
Wigs, for some people, may make you get clocked more. I wear wigs for conic conventions, but it's obvious they're wigs to people. Google is your best friend on this. There are so many hair types, there's not a simple answer. For styles, look up face shapes and hair styles, to find what fits what.
For clothes, I actually partially had GID because I already had my own fashion sense, but it was female. Googling what your body type is, and then searching clothing styles FOR the body type, is probably going to get you further than anyone but a personal tutor would. There are sooo many variables, such as short torso and long arms that would have their own style, but those clothes would clash with each other.
I've yet to try too many out, but sites like
joyofclothes.com have previews of how clothes will look on your general figure. I used one that lets you input your specific measurements, but can't remember it right now. Thing is, many of these say what works for or with what. Like, a person with some types may be recommended a skirt, and that skirt might be recommended with a pinstripe top.... but pinstripes might not look good on a taller lady.
Undergarments can make a bigger difference than you think. Victoria's Secret's employees often know the best styles and cuts. Not only does the proper type and fit help clothes look better on you (helping you "pass"), but the wrong types of cups may actually be bad for your breasts, and/or not support you properly, hurting your back.
For walking, the advice of walking on a line is a great place to start... then follow the other advice. Google videos and instructions on poise and how to be more elegant. The same rules here often apply to eating, and you'll probably run into those videos from YouTube's recommendations!
That should help you know what to look for, when you're watching other women, to mimic.
For male responses, fall back to elegance. For holding a door, it depends on what type of lady you want to be. A girl stopping and waiting for someone to approach the door, is odd in our society, but your call to do. Thing is, you can still wait a second to hold the door for the next person, if you want to be seen as polite and not a snob.
For conversing, elegance videos again (see a pattern?). Also, again with what kind of lady you want to be. Some studies say girls are less outspoken in groups, and that if they give their opinion over everything (like a man), they're seen as too pushy/assertive. Not saying it's true, just that it does seem to be a standard belief in etiquette.
For flirting.... guess what? You got it.... search.
There are different personality types, some being more introverted. You need to find methods of flirting that doesn't seem too different than your demeanor. Run through examples you find in your head, and see if they feel like they're the style you like, or would attract the type of person you'd want.
Good luck!